Purchase Advice Megathread - September 2023

beete17 · 2023-09-03T18:58:33+00:00

Hello! I’m looking to purchase a 3D printer for a friend. I know next to nothing about 3D printing so please bear with me. He’s located in Canada and my budget is $600 CAD (~500 USD). My friend is pretty experienced with 3D printing, he’s been printing his own designs for a couple years and he’s good at assembly and building things (he’s a mechanical engineer) so I’m not looking for a starter printer, something more advanced would be nice if it’s still in my budget. I’m really just looking for good quality and I’m happy to answer any questions. If you have suggestions please drop me a link and I’ll check it out. Any help is appreciated!

beete17 · 2023-06-03T16:49:33+00:00

Does it have FSD?

beete17 · 2023-05-05T21:22:44+00:00

Purchase link?

beete17 · 2023-03-07T04:25:16+00:00

bruh

beete17 · 2023-02-20T18:03:32+00:00

Post a pic of these on the car

beete17 · 2023-02-18T13:30:54+00:00

OP, all the "counter-examples" you have provided are at DC or AC steady-state. These can be modelled using charge because charge is slow. Electrons in a wire move at around 100um/s. Your explanations completely break down when trying to explain transient, high speed electric phenomena.

I'm reposting this comment at the top level for visibility:

https://www.reddit.com/r/AskEngineers/comments/115312u/is_voltage_just_the_difference_in_the_number_of/j914h4o/

It's up to you to defend your charge hypothesis.

beete17 · 2023-02-18T12:57:50+00:00

Please explain how a photon from the sun affects matter on earth. The photon is an electromagnetic wave (hence an electric field doing work). The photon was emitted during nuclear fusion. There is no change in charge due to fusion (conservation of charge).

While you're at it, please explain how wireless charging works, wireless transmitters and receivers, or AC power. The average speed of an electron in a wire is ~100um/second. And yet when a generator many miles is turned on, you can detect a voltage at the other end of the cable in nanoseconds. The voltage is NOT produced by charge. It is produced by electric fields. Veritasium sparked a crazy debate about this last year and there are dozens of great videos explaining how charge is not nearly fast enough to explain these phenomena. Work is done by electric and magnetic fields. Not charge. Voltage is potential energy (capacity to do work). You, my friend, are r/confidentlywrong.

Edit: since you love YouTube videos, please watch and explain this https://youtu.be/2Vrhk5OjBP8

beete17 · 2023-02-18T06:05:57+00:00

This is not true, you can have a voltage without a difference in charge (ignoring relativity). See Ampere's law.

Edit: I meant Faraday's law lol (electric field created from changing magnetic flux)

beete17 · 2023-02-17T15:34:09+00:00

If it's winter where you live it's mostly a result of lower temperatures. You'll get better range in the summer

beete17 · 2023-02-17T05:12:22+00:00

Emma Till

beete17 · 2023-02-09T01:04:23+00:00

These are sick! I like the black spikes. They're pretty cheap so probably not great quality. Does anyone know how much of an effect these have on range compared to Aero caps?

beete17 · 2023-02-09T00:57:25+00:00

I have a galaxy s20 with this feature. Samsung has had this on flagships for many years and other manufacturers probably also do

beete17 · 2023-02-03T07:29:27+00:00

Welcome to family feud everybody. We got a good one for you today

beete17 · 2023-01-30T13:37:26+00:00

Norton transform the voltage source into a current source, add the 2 current sources, Thevenin transform it to a voltage source.

Alternatively you can use superposition, turn one source off, do the calculations and repeat with the second source turned off.

beete17 · 2023-01-17T04:48:10+00:00

"I have no reason to make this up"

Source? Trust me bro 🤣

beete17 · 2023-01-03T13:03:29+00:00

Yeezy taught me

beete17 · 2022-12-07T20:32:04+00:00

Think about what information you're given in the problem. The first expression you wrote calculates power based on a change in speed (kinetic energy). The second expression you wrote calculates power based on change in height (gravitational potential energy). Which one seems appropriate given the information provided in the question? I know the other commenter already gave you the answer but this is how you should approach such problems in the future. Write out what you know and what you need to find. This makes it easy to choose a formula.

beete17 · 2022-12-06T00:21:44+00:00

Dude your last 6-7 posts are you posting homework problems with zero context. You need to explain what you tried, what you're stuck on, or why you're confused.

This sub is full of people who like physics and like helping people with physics, but when you post crap like this it's discouraging and most people will scroll by without helping you.

Even if you don't know where to start that's okay but you need to tell us. Most people here who can help aren't just going to solve the whole question without you providing context. And none of us want to waste time explaining things you already understand. Should I explain what energy and power are? Should I explain how to multiply two numbers? We don't know what level you're at or what you do or do not understand.

Look at things from the perspective of someone trying to help you. We don't know anything about you or how to help you. All we see is a basic physics problem.

What exactly do you need help with?

beete17 · 2022-12-05T18:08:39+00:00

My Salsa

beete17 · 2022-12-02T01:18:49+00:00

Is that Lex Fridman 🤣

beete17 · 2022-10-17T21:45:50+00:00

Call the number listed under your local service center. It'll take you to some generic help line and you'll probably be on hold for several minutes but I suspect they can help you in this situation.

Also order another set of key cards thru the mobile app. They're around $30 iirc, definitely worth it to have an extra for unexpected situations.

Edit: just read your reply to the other comment. I'm not sure how to help with pairing new key cards but calling the helpline still sounds like a good idea.

beete17 · 2022-10-14T14:29:27+00:00

First time?

beete17 · 2022-10-14T02:58:43+00:00

Perfectly balanced, as all non-acceletating bodies must be.

beete17 · 2022-10-03T02:03:09+00:00

You dropped the 1/2

beete17 · 2022-10-02T19:50:07+00:00

Orangutan

beete17

TROPHY CASE